I have no experience with Dobies, but I do have a 6 year old rottweiler that we camp with all the time, so I can address that.
In the area that I am in, there are very few campgrounds where there is a breed restriction. There are some, of course, but there is always an equivalent alternative that I can find easily.
Most places say that as long as the dog isn't aggressive, he is welcome. I appreciate that b/c I have a lovely and socialized rottie, but I have encountered aggressive labs and mean little dogs. I don't care what breed it is, if it's aggressive, get it away from me and my kids.
We were considering going to Niagara Falls this summer and I did find what I was looking for, but I had to search for quite awhile. Again, I did find it.
Same thing with Gatlinburg. Next year I want to go to the Smoky Mountains and in Galinburg there is a city ordinance against certain breeds and the Yogi Bear I wanted to stay at prohibits rotties. I called them personally and explained that we have stayed at multiple Yogies in Michigan, Kentucky, and Indiana, and it was never an issue. He said that they couldn't do it due to the city ordinance, he was very apologetic and even gave me the name and number for 2 other similar campgrounds. I called the other CGs, and the do accept any breed, and have what I was looking for at the Yogi park.
I would do it again for sure. In fact, next week we are getting an English Mastiff pup. So, we'll be camping with a rottweiler and a Mastiff, lmao!!